Pre-heat a large soup pot.
When soup pot is hot, add oil, saute’ garlic till it turns brown but not burn, removed toasted garlic and set it a side.
Add lemongrass in soup pot with hot oil, stirs well, add water and cook till water bubbling.
Add fish in to boiling water, cook till fish tender then add water spinach, stirs.
Seasoning with fish sauce, sugar and tamarind powder, stirs well.
Top with chopped mix herbs, chili pepper and toasted garlic.